Aquatic systems
What will be an ideal response?
•Marine & brackish systems
-Ocean
-Coastal regions
-Estuaries
-Mangrove swamps
-Salt marshes
--Freshwater systems
-Streams, rivers
-Lakes, ponds
-Swamps, bogs
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A homologous chromosome pair is best described as two chromosomes having ____
a. the same genes in the same order but possibly having different alleles of those genes b. the same alleles of the same genes in the same order c. the same alleles of the same genes in a different order d. different alleles of the same genes arranged in a different order e. identical DNA sequences
Modern humans evolved about
a. 200,000 years ago. b. 2,000,000 years ago. c. 2,000,000,000 years ago. d. 4,600,000,000 years ago.
Which of the following would NOT be an example of negative feedback control in homeostasis?
A. Exposure to cold water causes body temperature to drop. Decreased stimulation of heat receptors causes constriction of blood vessels near the skin and better retention of heat. B. Glucose levels rise following consumption of a big dessert, triggering release of insulin which causes glucose levels to fall. C. During the birth process, stretch receptors in the uterus stimulate the release of oxytocin from the pituitary gland. This hormone stimulates uterine muscle contraction that increases stimulation of the stretch receptors. D. Blood levels of glucose fall during sustained exercise, causing the release of glucagon which stimulates the release of glucose into the blood. E. Blood volume and pressure drop due to minor bleeding. This decreased pressure causes the kidneys to increase water reabsorption to restore blood volume and pressure.
During transmission across a typical chemical synapse
A) neurotransmitter molecules are stored in the synaptic cleft. B) action potentials trigger chemical changes that make the synaptic vesicles fuse with each other. C) vesicles containing neurotransmitters diffuse to the receiving cell's plasma membrane. D) neurotransmitter molecules bind to receptors in the receiving cell's plasma membrane.